defeat team rocket .
you restart..
it is unable to do
Save Silph Co., Just like in Blue.
because you need to save your game before trading a put your memory card connected with your gb memory card
You receive the master ball in leafgreen after you stop team rocket in silph co. In saffron city as a reward from the president of silph
u can unless u got scammed into a fake 1
the actual game itself must be damaged somehow.
You get it form the owner of the Silph Co building after you save him.
It's the system in which Gameboy Advance pokemon games save their data from if you don't have it installed you cannot save the game.
Help silph co then talk to the president he gives the masterball to you.
to get a bike in pokemon leafgreen you need to got to vermillion city where you need to talk to the president of pokemon fanclub. president will give you a bicycle pass. then you need to go to cerlulean city. there you need to exchange that pass with the bicycle shopkeeper.
You can only receive one master ball in leafgreen version its obtained from the president of Silph co after defeating team rocket and there boss.